Table 1.

Forward and reverse grouping

Anti-A	Anti-B	Anti-H	Anti-A1	Anti-AB	Anti-D1	Anti-D2	Ac	Bc	Oc	Auto	Temperature
4+	0	4+	2+	4+	4+	4+	3+	4+	0	0	Room temperature
4+	0	4+	2+	4+	4+	4+	4+	4+	0	0	37°C
4+	0	4+	2+	4+	4+	4+	1+	4+	0	0	4°C